Agilent Technologies 8590 Series Service Manual page 83

Figure 2-20 Second Mixer Match Adjustment Setup
16.Set the microwave spectrum analyzer controls as follows:
17.Adjust A5 2ND MIXER MATCH (refer to
amplitude as displayed on the microwave spectrum analyzer. Adjust
the reference level as necessary to keep the signal near top-screen.
Swept Bandpass Check
18.Set the analyzer controls as follows:
19.On the microwave spectrum analyzer, press trace B and MAX
HOLD. Wait for at least one complete sweep. Then press the
following keys to measure the 3 dB bandwidth.
20.Rotate the knob counterclockwise so that the marker delta
amplitude reads −3 dB.
Chapter 2
CENTER FREQUENCY .......................... 321.4 MHz
REFERENCE LEVEL .................................. −40 dBm
SPAN .............................................................. 20 MHz
dB/DIV ......................................................... 1 dB/DIV
, 20,
SPAN MHz
, 20,
SWEEP SEC
TRACE B VIEW
A ⇐ ⇒ B
PEAK SEARCH
∆
MARKER MODE,
Making Adjustments
12. Second Converter
Figure 2-18) for maximum
83